11.2.4Battery
In battery screen you can view the battery usage data since you last connected the phone to a power source. The screen also shows your battery status and how long it has been used since last charging.Touch one category, then you can learn its specific power consumption.
You can djust power use via the screen brightness or screen timeout in Display screen.
11.2.5Applications
You use the Applications settings to view details about the applications installed on your phone, to manage their data and force them to stop, and to set whether you want to permit installation of applications that you obtain from web sites and emails.
Manage applications
Touch to manage and remove installed applications.
Preferred install location
Touch to change prefered installation location for new applicaitons.
11.3Personal
11.3.1Accounts & sync
Use the Accounts & Sync settings to add, remove, and manage your Google and other supported accounts.You can also use these settings to control how and whether all applications send, receive, and synchronize data on their own schedules, and whether all applications can synchronize user data automatically.
Gmail, Google Calendar, and other applications may also have their own settings to control how they synchronize data; see the sections on those applications for details.
111
General sync settings
Touch the switch 
to permit applications to synchronize data in the background, whether or not you are actively working in them. Unmarking this setting can save battery power and lowers (but does not eliminate) data use.
Touch an account to see all sync options. Mark the checkbox to permit applications to synchronize data on their own schedule.
You can also touch Menu key and Sync now to synchronize data for chosen items of that account.
Manage accounts
The rest of this screen lists the Google Accounts and other accounts you’ve added to the phone. If you touch an account in this screen, its account screen opens.
This screen contains different options, depending on the kind of account. For Google Accounts, it lists the kinds of data you can synchronize to the phone with checkboxes so you can turn synchronizing on and off for each kind. You can also touch Menu key and Sync now to synchronize data. Touch Menu key and Remove Account to remove the account along with all its data (contacts, mails, settings, and so on).
11.3.2Location services
Google's location service
Mark the checkbox to use information from
112